What kind of camera do photographers usually buy, say the brand and model (if you say it in detail, you need to post the works of the master)

There are all kinds of brands, but most of them are film machines-even the best numbers can't compare with the color and width of film.

Typical ones are Leica M6 of Germany and GR of Ricoh, which belong to the kind of things that can be put in your coat pocket at any time and taken at critical moments.